<template>
  <el-container class="main_container">
    <el-header>
      <div class="left_box">
        <img src="../assets/img/touxiang.jpg">
        <span>新冠物资管理系统</span>
      </div>
      <div class="right_box">
        <el-dropdown>
          <img src="../assets/img/touxiang.jpg">
          <el-dropdown-menu slot="dropdown">
            <el-dropdown-item icon="el-icon-house">系统首页</el-dropdown-item>
            <el-dropdown-item icon="el-icon-ship">交流讨论</el-dropdown-item>
            <el-dropdown-item icon="el-icon-switch-button">退出登录</el-dropdown-item>
          </el-dropdown-menu>
        </el-dropdown>
      </div>
    </el-header>
    <el-container>
      <!--侧边栏-->
      <el-aside :width="isCollapse?'60px':'200px'">
        <!--展开/收起-->
        <div class="toggle_box" @click="toggleCollapse">|||</div>
        <el-menu
          default-active="2"
          class="el-menu-vertical-demo"
          @open="handleOpen"
          @close="handleClose"
          background-color="#001529"
          text-color="#fff"
          active-text-color="#ffd04b"
          :collapse="isCollapse"
          :collapse-transition="false"
          :unique-opened="true"
        >
          <MenuTree></MenuTree>
        </el-menu>
      </el-aside>
      <el-main>Main</el-main>
    </el-container>
  </el-container>
</template>

<script>// eslint-disable-next-line no-unused-vars
import MenuTree from '../components/MenuTree'

export default {
  name: 'Main',
  components: { MenuTree },
  data () {
    return {
      isCollapse: false
    }
  },
  comments: {
    MenuTree
  },
  methods: {
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    }
  }
}
</script>

<style lang="less" scoped>
  //设置整个容器的高度
  .main_container{
    height: 100%;
  }
  //头部布局
  .el-header {
    background-color: #001529;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    color: #FFFFFF;
    align-items: center;
    font-size: 20px;
    //左边logo和标题
    .left_box {
      display: flex;
      align-items: center;

      img{
        width: 60px;
        height: 60px;
        margin: 0px 5px 10px 10px;
      }

      span{
        margin-left: 15px;
      }
    }
    //右边的登陆头像
    .right_box{
      .el-dropdown>img{
        width: 60px;
        height: 60px;
        border-radius: 50%;
        background-color: #FFFFFF;
        margin: 0px 15px 0px 0px;
        background-size: contain;
        cursor: pointer;
      }
    }
  }
      //侧边栏
      .el-aside {
        background-color: #001529;
        .el-menu{
          border-right: none;
        }
        .toggle_box{
          background-color: chartreuse;
          font-size: 15px;
          font-weight: bold;
          line-height: 25px;
          color: #FFFFFF;
          letter-spacing: 0.2em;
          text-align: center;
          cursor: pointer;
        }
      }
      //内容主题
      .el-main {
        background-color: #E9EEF3;
        color: #333;
        text-align: center;
        line-height: 160px;
      }

      .el-dropdown-link {
        cursor: pointer;
        color: #409EFF;
      }

      .el-icon-arrow-down {
        font-size: 12px;
      }

</style>
